HumanLayer

Getting an AI agent to stop and ask a person before it does something risky is the job HumanLayer handles.

HumanLayer is an API and SDK for AI agents that lets them request help or approval from humans, and it works with all popular frameworks.

Messages go out through Slack, email or Discord, so the approver does not need a new app.

The Starter plan is free and includes 100 operations a month, up to 10 active users and limited data retention.

Extra operations are pay as you go at $20 per 200.

That is a small allowance if your agents ask for approval often, but fine for tinkering.

Premium costs $500 a month and includes 2000 operations, with $18 per 200 beyond that.

It adds advanced approval workflows with escalations and timeouts, learning and auto approvals, and the option to remove HumanLayer branding by bringing your own app and keys.

It also adds MS Teams, SMS and RCS channels, priority support, and 180-day retention on exported feedback datasets.

Enterprise covers private VPC or on-prem deployment, RBAC and SSO.